Blue Notes · Umpire Grade2026-04-16
KC @ DET
Home plate: Andy Fletcher
“The grade leaned — the ledger says which way.”
Umpire Grade
93.8% accurate
Run Favor
runs, DET
ABS Overturns
of 4 reviewed
What this shows — how Andy Fletcher called the 160 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 150 right. Below, only his misses are plotted, alongside every pitch the ABS (Automated Ball-Strike System) reviewed on a challenge.
The zone, as he called it
strike called ballball called strikeABS overturnedABS upheld
The calls that moved the game
- 1+0.69▼1 · 3-2 strike called ball
Gleyber Torres vs Kris Bubic - 2+0.30▼5 · 3-1 strike called ball
Javier Báez vs Kris Bubic - 3+0.28▲1 · 1-2 strike called ball
Vinnie Pasquantino vs Keider Montero
Run impact from the count run-value table: a missed strike three is worth far more than one on 3-0.
ABS — the Automated Ball-Strike System
4 pitches went to the robots · 3 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Kevin McGonigle — ump said ball, robot ruled strike: overturned.
- 2Carter Jensen — ump said ball, robot ruled ball: upheld.
- 3Michael Massey — ump said ball, robot ruled strike: overturned.
- 4Kevin McGonigle — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 1 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.